Method for preparing a suspension containing phosphate

Details Method for preparing a suspension containing phosphate Method for preparing a suspension containing phosphate

C - Chemistry, Metallurgy

05

G

C05G 3/00 (2006.01) C05B 7/00 (2006.01)

Patent

CA 2565193

The invention relates to a method for preparing a suspension containing phosphate stepwise directly from raw materials, from phosphoric acid of fertilizer quality, a base and organic additives. In accordance with the method, the phosphoric acid is preneutralised with the base, the organic additives are added, nucleation is controlled and phosphate salts are cooling crystallised in order to form a suspension. The phosphate suspension prepared with the method of the invention is applicable to seed coating.

La présente invention concerne un procédé permettant de préparer une suspension contenant du phosphate directement à partir de matières premières, à partir d'acide phosphorique d'une qualité d'engrais, d'une base et d'additifs organiques. Selon le mode de réalisation décrit dans cette invention, l'acide phosphorique est préalablement neutralisé avec la base; les additifs organiques sont ajoutés, la nucléation est régulée puis les sels de phosphate sont refroidis pour être cristallisés de manière à former une suspension. La suspension de phosphate préparée selon ce mode de réalisation peut être appliquée pour enrober des graines.

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